WX Flashcards
1
Q
9147
(refer to Figure 144.) What effect will a microburst encounter have upon the aircraft in positions3?
A
Strong downdraft.
AIM 7-1-25
2
Q
9214
Which weather condition is an example of a nonfrontal instability band?
A
Squall line.
3
Q
8723
A flight is scheduled at daybreak. The current conditions are rainy, but conditions are expected to clear. The forecast temperature is 10 degrees C, dew point 10 degrees C, with winds 330 degrees at 5 knots. What weather conditions can you expect?
A
The conditions are favorable for radiation fog.
4
Q
9182
What is the result when water vapor changes to the liquid state while being lifted in a thunderstrom?
A
Latent heat is released to the atmosphere.
5
Q
9215
Which atmospheric factor causes rapid movement of surface fronts?
A
Upper winds blowing across the front.
6
Q
9736
During an IFR cross-country flight you picked up rime icing which you estimate is 1/2” thick on the leading edge of the wings. You are now below the clouds at 2000 feet AGL and are approaching your destination airport under VFR. Visibility under the clouds is more than 10 miles, winds at destination airport are 8 knots right down the runway, and the surface temperature is 3 degree Celsius. You decide to
A
use a faster than normal approach and landing speed.
7
Q
9704
Data that may be added (manual weather augmentation) to the Automated Weather Observing System (AWOS) report is limited to
A
thunderstorms (intensity and direction), precipitation (type and intensity), and obstructions to visibility (dependent on the visibility being 3 miles or less).
AIM 7-1-11
8
Q
9448
Anti-icing fluid should provide freezing point protection to
A
a freezing point no greater than 20F below the ambient or airplane surface temperature.
9
Q
9939
(Refer to Figure 149A Area 10.)What is the forecast wind direction, speed, and temperature over ELY at 30,000 feet?
A
220 degrees, 35 knots, -33 degree C.
10
Q
9810
Large areas of land
A
tend to increase temperature variations.
11
Q
9747.3
Airborne weather radar is installed to help the crew
A
avoid server weather.
12
Q
9441
Which is a disadvantage of the one-step over the two-step process when deicing/anti-icing an airplane?
A
More fluid is used with the one-step method when large deposits of ice and snow must be flushed off airplane surfaces.
13
Q
9227
Where is the normal location of the jetstream relative to surface lows and fronts?
A
The jetstream is located north of the surface systems.
14
Q
9452
Snow on top of deicing or anti-icing fluids
A
must be considered as adhering to the aircraft.
15
Q
9185
What weather condition occurs at the altitude where the dewpoint lapse rate and the dry adiabatic lapse rate converge?
A
Cloud bases form.
16
Q
9238
Where do the maximum winds associated with the jetstream usually occur?
A
In the vicinity of breaks in the tropopause on the polar side of the jet core.
17
Q
9166
What is an important characteristic of wind shear?
A
It may be associated with either a wind shift or a windspeed gradient at any level in the atmosphere.
18
Q
9444
Which of the following will decrease the holding time during anti-icing using a two-step process?
A
Apply heated Type 2 fluid.
19
Q
9262
What type turbulence should be reported when it causes slight, rapid, and somewhat rhythmic bumpiness without appreciable changes in attitude or altitude, less than one-third of the time?
A
Occasional light chop.
20
Q
9293
(Refer to Figure 149.) What is the forecast temperature at ATL for the 3,000-foot level?
A
Not reported.
21
Q
9285
When you hear a SIGMET on an ATC frequency forecasting sever icing conditions on the route to your destination, you plan for
A
the possibility of freezing rain and freezing drizzle that can accumulate on and beyond the limits of any deicing/anti-icing equipment.
22
Q
9176
At which location does Coriolis force have the least effect on wind direction?
A
At the Equator.
23
Q
9151
What is a characteristic of the troposphere?
A
There is an overall decrease of temperature with an increase of altitude.
24
Q
9169
What condition produces the most frequent type of ground- or surface-based temperature inversion?
A
Terrestrial radiation on a clear, relatively calm night.
25
9240
| What weather feature occurs at altitude levels near the tropopause?
Maximum winds and narrow wind shear zones.
26
9143
| Maximum downdrafts in a microburst encounter may be as strong as
6,000 ft/min.
AIM7-1-25
27
9194
| Which condition produces weather on the lee side of a large lake?
Warm air flowing over a colder lake may produce fog.
28
9453
| Freezing point Depressant (FPD) fluids are highly soluble in water; however,
ice is slow to absorb it, and to melt when in contact with it.
29
9217
| What weather difference is found on each side of a 'dry line'?
Dowpoint difference.
30
9219
| What action is recommended when encountering turbulence due to a wind shift associated with a sharp pressure trough?
Establish a straight course across the strom area.
31
9198
| What feature is normally associated with the cumulus stage of a thunderstorm?
Continuous updraft.
32
9270
| (Refer to Figure 145.) What condition is reported at Dallas (KDAL)?
Altimeter setting is 30.07.
33
9207
| Which conditions are necessary for the formation of upslope fog?
Moist, stable air being moved over gradually rising ground by a wind.
34
9196
| Which weather phenomenon signals the beginning of the mature stage of a thunderstorm?
The start of rain at the surface.
35
9447
| What is the minimum glycol content of Type 2 deicing/anti-icing fluid?
50 percent.
36
9448
| Anti-icing fluid should provide freezing point protection to
a freezing point no greater than 20F below the ambient temerature.
37
9237
| What is a likely location of clear air turbulances?
In an upper trough on the polar side of a jetstream.
38
9186
| Which process causes adiabatic cooling?
Expansion of air as it rises.
39
9157
| At lower levels of the atmosphere, friction causes the wind to flow across isobars into a low because the friction
decreases windspeed and Coriolis force.
40
9146
(Refer to Figure 144.) When penetrating a microburst, which aircraft will experience an increase in performance without a change in pitch or power?
1
AIM 7-1-25
41
9747.2
| Maximum turbulence potential chart (GTG-2) are issued
hourly.
42
9287
(Refer to Figure 149.) What approximate wind direction, speed, and temperature (relative to ISA) are expected for a flight over OKC at FL 370?
260 true; 27 knots; ISA +6C.
43
9221
| What condition is necessary for the formation of structural icing in flight?
Visible water.
44
9167
What information from the control tower is indicated by the following transmission? 'SOUTH BOUNDARY WIND ONE SIX ZERO AT TWO FIVE, WEST BOUNDARY WIND TWO FOUR ZERO AT THREE FIVE.'
There is a possibility of wind shear over or near the airport.
AIM4-3-7
45
9230
| Which action is recommended if jetstream turbulence is encountered with a direct headwind or tailwind?
Change altitude or course to avoid a possible elongated turbulent area.
46
9257
| If a SIGMET alert is announced, how can information contained in the SIGMET be obtained?
By contacting the nearest flight service.
47
9193
| What minimum thickness of cloud layer is indicated if precipitation is reported as light or greater intensity?
4,000 feet thick.
48
9212
| When flying over the top of a severe thunderstorm, the cloud should be overflown by at least
1,000 feet for each 10 knots windspeed.
49
9183
| What is a feature of supercooled water?
The unstable water drop freezes upon striking an exposed object.
50
9189
| Convective clouds which penetrate a stratus layer can produce which threat to instrument flight?
Embedded thunderstorms
51
9165.1
| Low pressure areas are areas of
ascending air.
52
9188
| Which condition is present when a local parcel of air is stable?
The parcel of air resists convection.
53
9779
| The tropopause is generally found when the free air temperatures are
between -55degC and -65degC.
54
9709
| A calm wind that is forecast, in the International Terminal Aerodrome Forecast (TAF), is encoded as
00000KT
55
9139
| Which is a definition of 'sever wind shear'?
Any rapid change in wind direction or velocity which causes airspeed changes greater than 15 knots or vertical speed changes greater than 500 ft/min.
56
9283
Vertical wind shear can be determined directly from the dashed lines on the tropopause date chart. The vertical wind shear that is critical for probability of turbulence is
6 knots or more per 1,000 feet.
57
9228.1
| Steep frontal surfaces are usually associated with
fast moving cold front.
58
9209
| Which feature is associated with the tropopause?
Abrupt change of temperature lapse rate.
59
9268
| (Refer to Figure 146.) What method was used to obtain the METAR at Tyler (KTYR) at 1753z?
Automated Surface Observing System (ASOS), having a precipitation discriminator.
60
8265
| What action is required prior to takeoff if snow is adhering to the wings of an air carrier airplane?
Assure that the snow is removed from the airplane.
CFR121.629
61
9184
| What is indicated about an air mass if the temperature remains unchanged or decreases slightly as altitude is increased?
The air is stable.
62
9824
| In this METAR excerpt, "SLP993 SNINCR 1/10" means
there is 10" of snow on the ground with a 1" increase in the last hour.
the depth increase in the past hour and the total depth on the ground are separated from each other by a /.
63
9247
| What sources reflect the most accurate information on current and forecast icing conditions?
AIRMET Zulu.
64
9269
| (Refer to Figure 145.) What condition is reported at Childress (KCDS)?
Light rain showers.
65
9137
| Which wind-shear condition results in a loss of airspeed?
Decreasing headwind and increasing tailwind.
66
```
9717
The symbol ($) at the end of the following METAR indicates that METAR KFSM 131756Z AUTO 00000KT M1/4SM R25/0600V1000FT -RA FG VV004 06/05 A2989 RMK AO2 $
```
maintenance is needed on the system.
AIM7-1-11
67
9216
| In which meteorological condiitons can frontal waves and low pressure areas form?
Slow-moving cold fronts or stationary fronts.
68
9207.2
You are approaching an airport to land in 20 minutes. The METAR reports temperature 10 degrees C, dew point 10 degree C, winds 310/04, scattered clouds and rain. You expect
radiation fog.
69
9442
| The purpose of diluting ethylene glycol deicing fluid with water in non-precipitation conditions is to
decrease the freeze point.
70
9440.1
| Frozen dew is
hard and transparent.
71
9255
A station is forecasting wind and temperature aloft to be 280 at 205 knots; temperature -51C at FL390. How would this data be encoded in the FD?
789951
72
9160
| Where is the usual location of a thermal low?
Over the surface of a dry, sunny region.
73
9835
| A steady state tunderstorm is associated with
weather systems
74
9246
| Which are the only cloud types forecast in the Terminal Aerodrome Forecast?
Cumulonimbus
75
9445
| What should the deice/anti-ice fluid temperature be during the last step of a two-phase process?
Cold.
76
9232
| Clear air turbulence (CAT) associated with a mountain wave may extend as far as
5,000 feet above the tropopause.
77
9218
| Under what conditions would clear air turbulence (CAT) most likely be encountered?
When constant pressure charts show 20-knot isotachs less than 150 NM apart.
78
9747
| Volcanic Ash Advisory charts are updated every
6 hours
79
9700
| What is the effect of Freezing Point Depressant (FPD) fluid residue on engine fan or compressor blades?
It can reduce engine performance and cause surging and/or compressor stalls.
80
9925
| Cumulus clouds often indicate
possible turbulence.
81
9302
| Even a small amount of frost, ice, or snow may
hinder lift production to a point where takeoff will be impossible
82
9171
| What is the approximate rate unsaturated air will cool flowing upslope?
3C per 1,000 feet.
83
9708
| A squall is a sudden increase of at least 15 knots in average wind speed to a sustained speed of
20 knots or more for at least 1 minute.
84
9706
| A severe thunderstorm is one is which the surface wind is
58 MPH or greater and/or surface hail is 3/4 inch or more in diameter.
85
9440
| Which is an effect of ice, snow, or frost formation on an airplane?
Decreased angle of attach for stalls.
86
9716
The prevailing visibility in the following METAR is METAR KFSM 131756Z AUTO 00000KT M1/4SM R25/0600V1000FT -RA FG VV004 06/05 A2989 RMK AO2 $
less than 1/4 statute mile.
AIM 7-1-11
87
9252
How will an area of thunderstorm activity, that may grow to severe intensity, be indicated on the Severe Weather Outlook Chart?
APCHG within any area.
88
9250
| Which type of weather can only be directly observed during flight and then reported in a PIREP?
Turbulence and structural icing.
89
9288
(Refer to Figure 149.) What approximate wind direction, speed, and temperature (relative to ISA) are expected for a flight over TUS at FL270?
010 true; 5 knots; ISA +13C
90
9200
| Where do squall lines most often develop?
Ahead of a cold front.
91
9226
| What is the lowest cloud in the stationary group associated with a mountain wave?
Rotor cloud.
92
9718
The VV001 in the following METAR indicates METAR KFSM 131756Z AUTO 00000KT M1/4SM R25/0600V1000FT -RA FG VV001 A2989 RMK AO2 VIS3/4 RWY19 CHINO RWY19 $
a 100 foot indefinite ceiling.
AIM7-1-11
93
9698
The practice developed and accepted by the North American air carrier industry using traditional North American fluid is to ensure that the freeze point of the remaining film is below ambient temperature by at least
20F.
94
9134
| Which condition would INITIALLY cause the indicated airspeed and pitch to increase and the sink rate to decrease?
Sudden increase in a headwind component.
95
9207.1
| Precipitation induced fog
results from relatively warm rain or drizzle falling through cooler air.
96
9267
| (Refer to Figure 145.) What type of report is listed for Lubock (KLBB) at 1818z?
An Aviation selected special weather report.
97
9814
| Maximum downdrafts in a microburst encounter are strong and may include horizontal winds near the surface as strong as
45 knots.
AIM7-1-25
98
9159
| What is a feature of air movement in a high pressure area?
Descending to the surface and then outward.
99
9450
| Freezing Point Depressant (FDP) fluids used for deicing
are intended to provide ice protection on the ground only
100
9274
METAR KMAF 131756Z 02020KT 12SM BKN025 OVC250 27/18 A3009 RMK RAE44. Which weather condition is indicated by this METAR report at Midland (KMAF)?
Rain of unknown intensity ended 16 minutes before the hour.
101
9135
| Which INITIAL cockpit indications should a pilot be aware of when a constant tailwind shears to a calm wind?
Altitude, pitch, and indication airspeed increase.
102
9140
Doppler wind measurements indicate that the windspeed change a pilot may expect when flying through the peak intensity of a microburst is approximately
45 knots.
AIM7-1-25
103
9190
| Which type clouds are indicative of very strong turbulence?
Standing lenticular.
104
8258
The pilot in command of an airplane en route determines that icing conditions can be expected that might adversely affect safety of the flight. Which action is appropriate?
The pilot in command shall not continue flight into the icing conditions.
CFR121.629
105
9178
| Which weather condition is defined as an anti-cyclone?
High pressure area.
106
9224
Which type of icing is associated with the smallest size of water droplet similar to that found in low-level stratus clouds?
Rime ice.
107
9178.1
| A cyclone is
a hurricane force storm in the Indian Ocean.
108
9251
| Forecast winds and temperatures aloft for an international flight may be obtained by consulting?
Wind and temperature Aloft Chart prepared by the U.S. National Centers of Environmental Prediction (NCEP)
109
9295
| What wind direction and speed aloft are forecast by this WINDS AND TEMPERATURE ALOFT FORECAST (FD) for FL390- '750649'?
250 at 106 knots.
110
9233
| Summer thunderstorms in the arctic region will generally move
northeast to southwest in polar easterlies.
111
9923
| The stability of an air mass can usually be determined by
cloud types and the type of precipitation.
112
9241
| Where are jetstreams normally located?
In a break in the tropopause where intensified temperature gradients are located.
113
9191
| What is a feature of a stationary front?
Surface winds tend to flow parallel to the frontal zone.
114
9244
| Which primary source contains information regarding the expected weather at the destination airport, at the ETA?
Terminal Aerodrome Forecast.
115
9203
| Why are downdrafts in a mature thunderstorm hazardous?
Downdrafts are kept cool by cold rain which tends to accelerate the downward velocity.
116
9229
| Which type clouds may be associated with the jetstream?
Cirrus clouds on the equatorial side of the jetstream.
117
9292
| (Refer to Figure 149.) What will be the wind and temperature trend for a DSM LIT SHV flight at 12,000 feet?
Windspeed decrease.
118
9273
| (Refer to Figure 145.) What weather improvement was reported at Lubbock (KLBB) between 1750 and 1818 UTC?
The vertical visibility improved by 2,000feet.
119
9211
| A clear area in a line of thunderstorm echoes on a radar scope indicates
an area where precipitation drops are not detected.
120
9165
| What term describes an elongate area of low pressure?
Trough.
121
9291
| (Refer to Figure 149.) What will be the wind and temperature trend for a DEN ICT OKC flight at 11,000 feet?
Windspeed increase slightly.
122
9235
| Turbulence encountered above 15,000 feet AGL, not associate with cloud formations, should be reported as
clear air turbulence.
123
9264
What type turbulence should be reported when it momentarily causes slight, erratic changes in altitude and/or attitude, one-third to two-thirds of the time?
Intermittent light turbulence.
124
9272
SPECI KGLS 131802z 10012G21KT 060V140 2SM +SHRA SCT005 BKN035 OVC050CB 24/23 A2980 RMK RAB57 WS TKO RW09L WSHFT 58 FROPA. This SPECI report at Galveston (KGLS) indicates which condition?
Precipitation started at 1757.
125
9231
| Which action is recommended regarding an altitude change to get out of jetstream turbulence?
Descend if ambient temperature is falling.
126
9289
| (Refer to Figure 149.) What will be the wind and temperature trend for an SAT ELP TUS flight at 16,000 feet?
Wind direction shift from southwest to east.
127
9305
| What information is provided by a Convective Outook(AC)?
It provides prospects of both general and severe thunderstorm activity during the following 24 hours.
128
9286
| which type weather conditions are covered in the Convective SIGMET?
Embedded thunderstorms, lines of thunderstorms, and thunderstorms, and thunderstorms with 3/4-inch hail or tornadoes.
129
9145
(Refer to Figure 144.) If involved in a microburst encounter, in which aircraft positions will the most severe downdraft occur?
3 and 4
AIM7-1-25
130
9205
| Which type storms are most likely to produce funnel clouds or tornadoes?
Cold front or squall line thunderstorms.
131
9242
METAR KFSO 030856Z VRB02KT 7SM MIFG SKC 15/14 A3012 RMK SLP993 6///// T01500139 56012
In the above METAR, the SLP993 6//// indicates
sea-level pressure 999.3 hectopascals and an indeterminable amount of precipitation has occurred over the last 3 hours.
132
9284
(Refer to Figure 148.) Which system in the Convective SIGMET listing has the potential of producing the most severe storm?
The isolated storm 50 miles northeast of Memphis (MEM).
133
9208
| How are haze layers cleared or dispersed?
By wind or the movement of air.
134
9168
| Where is a common location for an inversion?
In the stratosphere.
135
9701
| The horizontal wind shear, critical for turbulence (moderate or greater) per 150 miles is
greater than 18 knots.
136
9281
| Constant pressure Analysis Charts contain contours, isotherms and some contain isotechs. The contours depict
ridges, lows, troughs and high aloft.
137
9158
| Which type wind flows downslope becoming warmer and dryer?
Katabatic wind.
138
9271
(Refer to Figure 145.)
The peak wind at KAMA was reported to be from 320 true at 39 knots
which occurred at 1743z.
139
9181
| When will frost most likely form on aircraft surfaces?
On clear nights with stable air and light winds.
140
9275
METAR KSPS 131757Z 09014KT 6SM -RM SCT025 OVC090 24/22 A3005.
SPECI KSPS 131820Z 01025KT 3SM +RA FC OVC015 22/21 A3000. Which change took place at Wichita Falls (KSPS) between 1757 and 1820 UTC?
A funnel cloud was observed.
141
9710
In the International Terminal Aerodrome Forecast (TAF), a variable wind direction is noted by 'VRB' where the three digit direction usually appears. A calm wind appears in the TAF as
00000KT.
142
9707
On the constant pressure analysis chart, satellite and aircraft observations are used in the analysis, over areas of sparse data. A satellite observation plotted using
a star at the cloud top location.
143
9177
| How does Coriolis force affect wind direction in the Southern Hemisphere?
Causes clockwise rotation around a low.
144
9775
| Which of the following weather conditions are conductive to in-flight icing?
Visible rain with temperatures below 0 degrees C.
145
9192
| Which event usually occurs after an aircraft passes through a front into the colder air?
Atmospheric pressure increases.
146
9130
| What is the expected duration of an individual microburst?
Seldom longer than 15 minutes from the time the burst strikes the ground until dissipation.
AIM 7-1-25
147
9708.1
| Shear turbulence from a thunderstorm has been encountered
20 miles from the severe thunderstorm.
148
9294
(Refer to Figure 149.) What approximate wind direction, speed, and temperature (relative to ISA) are expected for a flight over MKC at FL 260?
260 true; 43 knots; ISA +10C.
149
9144
An aircraft that encounters a headwind of 45 knots, within a microburst, may expect a total shear across the microburst of
90 knots.
AIM7-1-25
150
9185.1
| Adiabatic warming is also described as
compressional heating.
151
9210
| Which type cloud is associated with violent turbulence and a tendency toward the production of funnel clouds?
Cumulonimbus mammatus.
152
9926
| (Refer to Figure 144.) On final approach to the airport, airplane in position 5 would experience
poor performance.
AIM7-1-25
153
9922
What is indicated by the following report?
TYR UUA/OV TYR180015/TM 1757/FL310/TP B737/TB MOD-SEV CAT 350-390
An urgent pilot report for moderate to severe clear air turbulence.
154
9197
| During the life cycle of a thunderstorm, which stage is characterized predominately by downdrafts?
Dissipating.
155
9149
| (Refer to Figure 144.) How will the aircraft in position 4 be affected by a microburst encounter?
Performance decreasing with a tailwind and downdraft.
AIM7-1-25
156
9138
| Which wind-shear condition results in an increase in airspeed?
Decreasing tailwind and increasing headwind.
157
8735
What hazard should you expect for a morning departure from KPDX, based on this METAR? KPDX 271154Z 0000KT 9SM CLR -10/-10 A2979.
Frost on the aircraft.
158
9161
| Freezing rain encountered during climb is normally evidence that
a layer of warmer air exists above.
159
9202
| Atmospheric pressure changes due to a thunderstorm will be at the lowest value
when the thunderstorm is approaching.
160
9179
| Which conditions result in the formation of frost?
Temperature of the collecting surface is below the dewpoint and the dewpoint is also below freezing.
161
9443
| Which procedure increases holding time when deicing/anti-icing an airplane using a two-step process?
Heated Type fluid followed by cold Type 2 fluid.
162
9449
| Clear ice generally forms in outside temperature ranges of
0 to -10 deg C.
163
9747.1
All ATC facilities using radar weather processors with the ability to determine precipitation intensities will describe the intensity as
light, moderate, heavy, extreme
164
9152
| What is the primary cause of all changes in the Earth's weather?
Variations of solar energy at the Earth's surface.
165
9131
| Maximum downdrafts in a microburst encounter may be as strong as
6,000 ft/min.
166
9175
| Isobars on a surface weather chart represent lines of equal pressure
reduced to sea level.
167
9711
On the constant pressure analysis chart, aircraft and satellite observations are used in the analysis over areas of spares data. An aircraft observation is plotted using
a square at the aircraft location.
168
9774
| The most likely condition in which to experience severe inflight icing with the ambient temperature below 0 degree C is
rain
169
9148
| (Refer to Figure 144.) What effect will a microburst encounter have upon the aircraft in position 4?
Strong tailwind.
AIM 7-1-25
170
9748
| When flying in the rain and an air temperature of 1 degree C, a pilot should
be aware of the possibility of airframe icing.
171
9249
| If squalls are reported at the destination airport, what wind conditions exist?
A sudden increase in wind speed of at least 16 knots, the speed rising to 22 knots or more for 1 minute or longer.
172
9451
Test data indicate that ice, snow, or frost having a thickness and roughness similar to medium or coarse sandpaper on the leading edge and upper surface of a wing can
reduce lift by as much as 30 percent and increase drag by 40 percent.
173
9238.1
| The rate of decrease in wind speed from the jet stream core is considerable greater on the
polar side.
174
9239
| Which type jetstream can be expected to cause the greater turbulence?
A curving jetstream associated with a deep low pressure trough.
175
9228.2
| If a sample of air is forced upward and it is colder than the surrounding air, it
sinks until it reaches denser air.
176
9446
| What is the minimum glycol content of Type 1 deicing/anti-icing fluid?
80 percent.
177
9245
Weather conditions expected to occur in the vicinity of the airport, but not at the airport, are denoted by the letters 'V(C).' When V(C) appears in a Terminal Aerodrome Forecast, it covers a geographical area of
a 5 to 10 statute mile radius from the airport.
178
9150
| What is the expected duration of an individual microburst?
Seldom longer than 15 minutes from the time the burst strikes the ground until dissipation.
AIM 7-1-25
179
9276
| (Refer to Figure 146.) What was the ceiling at Walnut Ridge (KARG)?
1,000 feet AGL.
180
9162
| What temperature condition is indicated if precipitation in the form of wet snow occurs during flight?
The temperature is above freezing at flight altitude.
181
9195
| How can the stability of the atmosphere be determined?
Ambient temperature lapse rate
182
9223
| Which type precipitation is an indication that supercooled water is present?
Freezing rain.
183
9248
| What weather is predicted by the term VCTS in a Terminal Aerodrome Forecast?
Thunderstorms are expected in the vicinity.
184
9206
You are planning a flight to a coastal area which is currently below published weather minimums for the ILS approach due to fog. The winds are forecast to increase to 20 knots from the west at your schedueled arrival time. What weather should you expect?
A low layer of stratus or stratocumulus clouds.
185
9135.1
| Which initial cockpit indications should a pilot be aware of when a constant headwind shears to a calm wind?
Altitude, pitch, and indicated airspeed decrease.
186
9263
What type turbulence should be reported when it causes changes in altitude and/or attitude more than two-thirds of the time, with the aircraft remaining in positive control at all times?
Continuous moderate turbulence.
187
9180
| What condition is indicated when ice pellets are encountered during flight?
Freezing rain at higher levels.
188
9266
| (Refer to Figure 145.) What was the local Central Standard Time of the Aviation Routine Weather Report at Austin (KAUS)?
11:53 a.m.
189
9132
An aircraft that encounters a headwind of 40 knots, within a microburst, may expect a total shear across the microburst of
80 knots.
AIM7-1-25
190
9776
A jet stream is a narrow, shallow, meandering river of maximum winds extending around the globe in a wavelike patter with speeds of
50 knots or greater.
191
9154
| What feature is associated with a temperature inversion?
A stable layer of air.
192
9141
Which airplane performance characteristics should be recognized during takeoff when encountering a tailwind shear that increases in intensity?
Loss of, or diminished, airspeed performance.
193
9924
| Clouds with extensive vertical development over mountainous terrain are a sign of
an unstable air mass.
194
9133
| Which INITIAL cockpit indications should a pilot be aware of when a headwind shears to a calm wind?
Indicated airspeed decreases, aircraft pitches down, and altitude decreases.
195
9155
| When does minimum temperature normally occur during a 24-hour period?
After sunrise.
196
9199
| What is indicated by the term 'embedded thunderstorms'?
Thunderstorms are obscured by other types of clouds.
197
9452
| Snow on top of deicing or anti-icing fluids
must be considered as adhering to the aircraft.
198
9136
| What is the recommended technique to counter the loss of airspeed and resultant lift from wind shear?
Maintain, or increase, pitch attitude and accept the lower-than-normal airspeed indications.
199
9290
| (Refer to Figure 149.) What will be the wind and temperature trend for an STL MEM MSY flight at FL 330?
Windspeed decrease.
200
9215.1
| Dew point fronts result from
air density differences due to the humidity levels.
201
9259
| Which weather condition is present when the tropical storm is upgraded to a hurrican?
Sustained winds of 65 knots or more.
202
9296
| What wind direction and speed aloft are forecast by this WINDS AND TEMPERATURE ALOFT FORECAST (FD) for FL390-'731960'?
230 at 119 knots.
203
9153
| What characterizes a ground-based inversion?
Poor visibility.
204
9187
| When saturated air moves downhill, its temperature increases
at a slower rate than dry air because vaporization uses heat.
205
9229.1
| When high level moisture is available, cirrus clouds forms on the
equatorial side of the jet stream.
206
9236
| A strong wind shear can be expected
on the low pressure side of a 100-knot jetstream core.
207
9713
KFTW UA/OV DFW/TM 1645/FT100/TP PA30/SK SCT031-TOP043/BKN060-TOP085/OVC097-TOPUNKN/WXFV00SM RA/TA07.
This pilot report to Fort Worth (KFTW) indicates
the ceiling at KDFW is 6,000 feet.
208
9142
Thrust is being managed to maintain desired indicated airspeed and the glide slope is being flown. Which characteristics should be observed when a tailwind shears to a constant headwind?
PITCH ATTITUDE: Increases. VERTICAL SPEED: Decreases. INDICATED AIRSPEED: Increases, then decreases.
209
9777
| Clear air turbulence associated with a jet stream is
most commonly found in the vicinity of the tropopause.
210
9277
METAR KHRO 131753Z 09007KT 7SM FEW020 BKN040 30/27 A3001.
SPECI KHRO 131815Z 13017G26KT 3SM +TSRA SCT020 BKN045TCU 29/24 A2983 RMK RAB12 WS TKO LDG RW14R FRQ LTGICCG VC.
What change has taken place between 1753 and 1815UTC at Harrison (KHRO)
Thundershowers began at 12 minutes past the hour.
211
9228
| Which type frontal system is normally crossed by the jetstream?
Occluded front.
212
9213
| If the winds aloft are blowing parallel to the front,
the front moves slowly if at all.
213
```
9278
A PROB40 (PROBability) HHhh group in an International Terminal Aerodrome Forecast (TAF) indicates the probability of
```
thunderstorms or other precipitation.
214
9225
| Which is a necessary condition for the occurrence of a low-level temperature inversion wind shear?
A calm or light wind near the surface and a relatively strong wind just above the inversion.
215
9777.1
| The threshold wind speed in the jet stream for clear air turbulence is generally considered to be
110 kts.
216
9185.2
| Temperature and radiation variations over land with a clear sky typically lead to
incoming terrestrial radiation peaking at noon.
217
9201
| Where can the maximum hazard zone caused by wind shear associated with a thunderstorm be found?
On all sides and directly under the thunderstorm cell.
218
9695
| The adverse effects of ice, snow, or frost on aircraft performance and flight characteristics include decreased lift and
an increased stall speed.
219
9170
| Which term applies when the temperature of the air changes by compression or expansion with no heat added or removed?
Adiabatic.
220
9156
| Which area or areas of the Northern Hemisphere experience a generally east to west movement of weather systems?
Arctic and subtropical.
221
9454
| Freezing Point Depressant (FDP) fluid residue on engine fan or compressor blades
can reduce engine performance and cause surging and/or compressor stalls.
222
9204
| What is a difference between an air mass thunderstorm and a steady-state thunderstorm?
Air mass thunderstorm downdrafts and precipitation retard and reverse the updrafts.
223
9234
| Which arctic flying hazard is caused when a cloud layer of uniform thickness overlies a snow or ice covered surface?
Whiteout.
224
9220
In comparison to an approach in a moderate headwind, which is an indication of a possible wind shear due to a decreasing headwind when descending on the glide slope?
Higher pitch attitude is required.
225
9260
| What is the general direction of movement of a hurricane location in the Caribbean or Gulf of Mexico region?
Northwesterly curving to northeasterly.
